Demountable tire-rim.



B. C. BALL & L. E. YOUNIE DEMOUNTABLE TIRERIM.

APPLICATION FILED FEB. s. 1912.

1,1521%, Patehted Oct; 19, 1915.

Hinewc an s rains ma BERT C. BALL.AND LEWIS EDWARD YOUNIE, OF ZPORTLAND, OREGON. v

DEMOUNTABLE TIRE-RIM.

Specification of Letters Patent. l

Patented Get. 19, 1M5.

To all whom it may concern Be it known that we;

I. Lnwrs E. YoUNm, citizens of the United 'lol ring arranged outside of the separated part The-rim part 8 has a States, residing at Portland, in the county of Multnomah and State of Oregon, have invented new and useful Improvements in Demountable Tire-Rims, oflwhich the following is a specification.

This invention relates to demountable tire rims and consists in certain improvements in the construction thereof as will be herethe claims. 1

As shown, the rim is designed, for tires.

formed with inextensible edges and commonly called the Dunlop type of-tire, but some features of the invention are capable of use in connection with rims adapted to other forms of tires. I The invention is illustrated in the accompanying drawings as follows Figure 1- shows a side elevationof a wheel with a tire in place thereon. Fig. 2 a side elevation of a rim showing the method of disengaging the parts, the radial dimension. of the r m being exaggerated to better show I construction. Fig. 3 is a cross section on the line 3-3 in Fig. 1; Fig. 4 is a section on the line 4l in Fig. 5. Fig. 5 a plan view of a fragment of arim.

1 marks the wheel hub, 9 the spokes and 3 the felly. These are of ordinary construction. A. fixed rim 4 is fixed on the telly 3. It has the tapered or slanting surfaces 5 and 6.- The demountable rim; is formed in two parts, the part 7 being separated trans versely at 20 and the part 8 is a complete 7. The separated rim'part' has the out-- wardly extending shoulder 9 which interlocks with and engagesthe inwardly extending shoulder 10 on the rim part 8.

The rim part 7 has the supporting surfaces 11 and 12which are adapted to engage the tapered surfaces 5 and 6 on the fixed rim 4. The rim parts 7 and 8 also have the tire retaining flanges 13 and 14 formed direptly on the rim parts. A tire 15 is shown in place on the rim. It has the reinforced edges 16 and 17. A portion of the inner tul e is shown as 18.

lip 19 extending laterallyj: from the shoulder 10 and overlapping the rimpT-f t 7. This lip pe'rfor s very enough across th rimpartz'l tp form; a elo- ERT C. BALL and rim part 7. As'the bolt, is tightened, the

surfaces 11 and 12 acting on the surfaces 5 and 6 force the rim part '7 against the inner surface of the rim part 8, thereby clamping the rim part 7 against the rim part 8. This. inafter fully described and pointed out in is particularly important in the separated run part where the tire retaining flange 1S as it were, so that any give at the point of separation must be consequent upon actual bending in the short distance in. which thc tire retaining flange projects beyond the cla'mped portions. In this clamping feature, therefore, the lip 19 assists materially by extending the clamped portion to points near the separated flange of. the rim part 7. When it is .desired to detach a tire, this can be accomplished by springing in one end of the separated rimpart 7 so that the shoulder 9 Wlll clearthe shoulder 10. As soon as the end sprung in clears the opposite end of the rim-part, the'end sprung in may be pulled past the one in place thus stripping the separated rim part from the rim part 8. This same action. tears the rim part loose from the edgeof the tire if it has become cemented to it.

In order to prevent the disengagement of the rim parts with the tire inflated and the rim parts demounted, it is desirable to give the abutting surfaces of the ends of the rim par-t 7 as little clearance as possible especially along the separation 23 which extends through the tire retaining flange. The 'lateral pressure of the tire acting on the flange 13has a cam action .on the flange which:

tends to collapse this rim part; thus ,"forcing the ends of the rim part into close engage-H merit. So long asthe on thetire nelthe part can be ardlyv because of-this enga ement a ne wa thedisengage men-cfth f is avoided-is .Asan

pressure: maintained d"of-the;separatedrnn v slalom however, We ioulder 10, as clearly 9 and in this manner to :he rim purl; against disie is inflated.

irate che removal of the i provide the shoulder or slo inwardly. Where end oi she separated rim out in place/and the rim part to pusion by simply crowding I io sioping s rface 24L acting as "the edge of the shoulder 9 ii ar the shoulder 10.

marerml having the shoul- While ifho part 7 can stool; being of uniform houim in this connection 7 etly above the sup port nee in that ihe lateral oortiou is less apt to eiiocl; 1 material \vliore this on, shun 153 though the sl1oi1lplanes at 'riyhlaiiiggles to iiu as new is:- ioui'iiiah tire rim, the combi: .1 o riauparts, the first part sopa verse" and having a tire retaingo, and a exterior lockoi the assembled rini from the tire retaining part; and a second purl; so rirur and having an inulder engaging the exterior h lthe first part, having a l i its edge, and having .ling :y from the locking r overlapping the first part to a point izo the lire retaining flange on the and adapted to form a closure engaging the tire retaining l'irsi; rim part iomiiahie tire. riln, the con1hishe shoulder: and a second part sepa- -i. wisely and having an exterior L :,on for engaging said interior '2 hf i1, said rim parts having Lire retain s thereon sliii riu outwardly from ttoui oi the assembled run and tending use saio parts umler the lateral prosjho l r i .H: r 5 ends (lililbiilli .ou 'iil" into engagement by lh rig a, tire retain-- a; i exterior loclo meme rat the part 8 formed ing shoulder at the sidoof the assembled rim the more remote from the tire retainin: flange on said first part; and a second pal forming a complete ring and having an interior locking shoulder engaging the exterior s looking shoulder on the first part, hari av tire retaining fiange at its edge, and having a lip extending inwardly from She looking shoulder overlapping the first partto a point adjacent to the tire retaining flange on the first rim. part and adapted to form a closure with a til-sedge engaging the sire retaining flange onftlie first run part, said tire retaining flanges sloping outwardly from the bot tom and tending to collapse the parts under the lateral pressure of an inflated tire on. said retaining flanges, th separa-tod rim part having its ends abutting and adapted he brought into engagement by the collapsing movement incident to the lateral pressure of an inflated lire on the flanges lo prevent rho separation of the ends when the tire do i'uou'nted and inflated.

in a demountable tire rim, the combination of an annulus having an. inierior shoulder; a rim part secured thereto, said rim part being separated transversely and having an exterior shoulder engaging said. interior shoulder,.said shoulders being; an dercnt adjacent to the ends of said rim part, and having a tire retaining flange thereoin said tire flange sloping outwardly and tending to collapse said rim part under the lat" oral pressure of an inflated tire and the ends of said rim pert abutting and adapted to he brought into engagement by the collapsing movement incident to the lateral pressure of an inflated tire to prevent the separation of the ends when the tire is demounted and in fluted.

5. In a demountable tire rim, the cou1hination of two rim parts, the first part forming; a complete ring having an interior shouldor thereon, and a tire retaining flange thereon; and a second rim part separated transversely and having an exterior shoulder thereon for orig-aging said interior shoulden, said shoulders being undercut adjacent to the ends of the separated rim part, the said second rim part having attire retaining flange thereon, said tire retaining fiano'es slopingIouhvardly and tending to collapse said separafied rim part by the late *al pres sure of an inflated tire fzlhsreon and the S61')&- rated rim part having its ends abutting and a adapted to be broughi; infio engagemon'lz by thopcollapsing movement incident to a'late 'al pressure of an inflated tire to prevent separation ofthe ends when the tire is do mounted and inflated.

' 6. In a demountable tire rim, the so nation of two rim parts, one in the for a complete ring having 2.11 interior loel; 3 shoul jler thereon, and a sire retaining flange; and a second rim part having an exterior shoulder thereon, and a tire refiaiming flange, set our hands in the presence of two subthe suui second run part berng sepamted scrlbmg'wltnesses'.

transversely and formed of material of uni- BFRT 0 BALL farm thickness, the portion of the rim part LIKWVIS E R YOUNIF '5 opposite the engaging surface of the exte- J ,1'101' shoulder being on a slant to said en- Witnesses:

gaging surface for the purpose described. H. V. CARPENTER,

in te sti monywhereof We have hereunto ELIJAH-CORBETT. 

